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Kinesiology 1080A/B
Matthew Heath

Kin 1080 – Feb. 27, 2013 Measurement, Interpretation & Evaluation of Motor Skill Performance - Techniques used in the movement sciences allows us to better understand the structure, function and organization system of the CNS Measuring Motor Behaviour (Levels of Analyses) 1) Performance Outcome 2) Describing the Movement 3) Measuring activity of the central nervous system (CNS) Performance Outcome A. Measures of Time & Speed  The performer who can accomplish an action in a given time is more efficient I. Reaction Time: RT (common technique) o The interval between the onset of a signal (stimulus) and the initiation of a response o Once the movement starts, the reaction time is over o Reaction Time tasks: 1) Simple reaction time (SRT) 2) Choice reaction time (CRT) 3) Discriminant reaction time (DRT) - Common technique and is used to measure reaction time: represents the interval between the onset of a signal stimulus and initiation of a response - Reaction Time is the speed at which you can detect the stimulus & and the processing time to initiate a response (Stimulus detection & response program) Reaction Time  Foreperiod (warning signal): the period to get ready  Then it’s the go signal and the time between the go signal and the movement starts is the reaction time interval  Response latency and reaction time can be used interchangeably  The time between movement starts and movement ends is movement time  Movement and reaction time are not related operations  Total response time: reaction time + movement time  Randomize foreperiod: Vary the fore period in order to prevent participant from anticipating the go signal (you get a pure measure of reaction time from doing this) Reaction Time Tests o Simple RT tests  pure measure stimulus identification and of sensory processing & reaction time o Choice RT tests  you can have multiple stimuli and each one is linked to a separate response; because the participant has to make a choice, the reaction time will be slower. This is because you have to make numerous cognitive decisions; Two components: identifying the appropriate stimulus and selecting the appropriate response for it; o This requires a lot of top down decision  in the frontal lobe o Individuals with frontal lobe impairments are going to show longer choice reaction times o Discriminant RT test  All stimulus is shown, but only respond to one stimulus; this is very difficult because we are stimulus driven creatures and we simply just want to response o We have to inhibit it and this also requires top down decision (frontal lobe; response inhibition) Reaction Time (Continued) - Reaction time can be fractionated into:  Premotor RT:  Period of time between onset of stimulus and b
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